Polymeric Materials Mid - I, September - 2014

1.The following is an example of a natural polymer ________
  • PVC
  • Nylon
  • Cotton
  • Terylene
Answer: C
2.The following is an example of a synthetic polymer ________
  • Silk
  • Nylon
  • Wool
  • Rubber
Answer: B
3.The polymer which can be re-shaped is called
  • Thermoplastic polymer
  • Thermosetting polymer
  • Homo polymer
  • Co-polymer
Answer: A
4.Polystyrene is an example of
  • Linear polymer
  • Branch polymer
  • Cross-linked polymer
  • Network polymer
Answer: A
5.The cross linking process in elastomers is called
  • Condensation
  • Addition
  • Vulcanization
  • Depolymerization
Answer: C
6.A white synthetic garment turning yellow after long use is known as
  • Photo degradation
  • Photo stabilizer
  • Colorants
  • Stabilizers
Answer: A
7.Filler materials are added to polymers to improve
  • Strength
  • Flexibility
  • Oxidation
  • Color
Answer: A
8.Calendering produces continuous
  • Plates
  • Sheets
  • Strips
  • Rounds
Answer: B
9.Rotational casting produces ___________ articles.
  • Hollow
  • Solid
  • Powder
  • Liquid
Answer: A
10.The minimum functionality that a monomer must have for polymerization is _______
  • 4
  • 3
  • 2
  • 1
Answer: C
11.Glass is an example of _______________ substance.
Answer: Inorganic
12.Polymer is synthesized from a small unit is called ________________
Answer: Monomer
13.When all the repeating units along a chain are of the same type, the resulting polymer is called as________________
Answer: Homopolymer
14.Phenol formaldehyde is an example of _______________ polymer.
Answer: Network
15.Increasing the molecular weight in polymers, glass transition temperature ____________
Answer: Increases
16.Foaming is produced by adding agents.
Answer: Foaming/Blowing
17.Polymers are protected against oxidative degradation by adding
Answer: Antioxidants
18.Water as a byproduct is formed in polymerization.
Answer: Condensation
19.High degree of crystallinity is always not preferable because of
Answer: Brittleness
20.Plastics are non _________________material.
Answer: Biodegradable